MXRA7 is involved in megakaryocyte differentiation and platelet production

Zhenjiang Sun; Benfang Wang; Ying Shen; Kunpeng Ma; Ting Wang; Yiqiang Wang; Dandan Lin

doi:10.1097/BS9.0000000000000167

MXRA7 is involved in megakaryocyte differentiation and platelet production

Blood Sci. 2023 Jul 5;5(3):160-169. doi: 10.1097/BS9.0000000000000167. eCollection 2023 Jul.

Authors

Zhenjiang Sun¹, Benfang Wang^{1

2}, Ying Shen¹, Kunpeng Ma¹, Ting Wang¹, Yiqiang Wang³, Dandan Lin¹

Affiliations

¹ Institute of Blood and Marrow Transplantation, National Clinical Research Center for Hematologic Diseases, Collaborative Innovation Center of Hematology, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou Medical College, Soochow University, Suzhou 215006, China.
² Department of Clinical Laboratory, The Affiliated Jiangyin Hospital of Southeast University, Jiangyin 214400, China.
³ Wisdom Lake Academy of Pharmacy, Xi'an Jiaotong-Liverpool University, Suzhou 215123, China.

Abstract

Matrix remodeling is a critical process in hematopoiesis. The biology of MXRA7, as a matrix remodeling associated gene, has still not been reported in hematopoietic process. Public databases showed that MXRA7 expressed in hematopoietic stem cells, suggesting that it may be involved in hematopoiesis. We found that the amounts of megakaryocytes were lower in bone marrow and spleen from Mxra7^-/- mice compared with that from wild-type mice. Knock-out of MXRA7 also reduced the amount of platelet in peripheral blood and affected the function of platelets. Knock-out of MXRA7 inhibited hematopoietic stem/progenitor cells differentiate to megakaryocytes possibly through down-regulating the expression of GATA-1 and FOG-1. Moreover, knockdown of MXRA7 in MEG-01 cells could inhibit the cell proliferation and cell apoptosis. Knockdown of MXRA7 inhibited the differentiation of MEG-01 cells and proplatelet formation through suppressing the ERK/MAPK signaling pathway and the expression of β-tubulin. In conclusion, the current study demonstrated the potential significance of MXRA7 in megakaryocyte differentiation and platelet production. The novel findings proposed a new target for the treatment of platelet-related diseases, and much more investigations are guaranteed to dissect the mechanisms of MXRA7 in megakaryocyte differentiation and platelet production.

Keywords: MXRA7; differentiation; megakaryocytes; platelet.

Copyright © 2023 The Authors. Published by Wolters Kluwer Health Inc., on behalf of the Chinese Medical Association (CMA) and Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College (IHCAMS).